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net/http: no Client API to close server connection based on Response #21978
What version of Go are you using (
changed the title
No way in HTTP2 for http.Client to close its connection
Mar 30, 2018
I'm not sure this is even HTTP/2 specific. The net/http API doesn't really expose much or any details of the underlying connections. It's mostly a request/response-based API only.
We do have CloseIdleConnections, but that should work the same way between HTTP/1 and HTTP/2. If not, that's a bug and we should fix that, rather than add new API surface.
That said, even with CloseIdleConnections, there's no nice way to do what you're wanting with either HTTP/1 or HTTP/2, as you can't close the connection until it's idle, and by the time it's "idle", another request might've arrived on it.
@rs sent out a document about expanding the HTTP/2 connection pool interface while I was on vacation. See #17776 (comment) and that bug and linked CLs. Maybe this is another use case that design could address. @rs, thoughts?
I suppose one path could be taking advantage of the fact that
If you implement your own connection pool (with the patches I proposed here), you could just remove the connection from the pool when you detect a 500 error. To close the connection, you then call